RMD Miller Technology MILLER with Dioxide Carbon SG

Date 11-15-2021 19:58

Hello friends and dear colleagues:

Anyone has had experience welding with RMD Technology MILLER and shielding gas Dioxide Carbon at root pass ? It´s possible at theory ; but how effective can be . Thankful for your advices.

Best Regards

Miguel Teran

By 803056

Date 11-16-2021 02:26

We qualified WPS for carbon and low alloy steel using 90%Ar with 10%CO2 per Miller's recommendations. We did not use 100% CO2.

Al

By Lawrence (*****)

Date 11-17-2021 14:03 Edited 11-17-2021 14:08

Miller Says Yes

https://www.weldersupply.com/Content/files/PipeWorxRemoteFeeder%20-%20Copy%201.pdf

How effective depends on what you are welding eh?

How will you accomplish fill and cap passes ? With Co2 you will not get a spray transfer. Will you switch to FCAW for everything but the root?

How the C02 performs on the root will also have a lot to do with the base metal type, if impacts are required and more.

I suppose a dual feeder GMAW setup with solid wire on one side and FCAW on the other could do a very good job on pipe... RMD for the roots and FCAW on the fill...... All with Co2 weld gas. It's possible.

If you are in the "shopping stage" I would just ask Miller to bring a RMD power supply into your shop and prove what it can do before you lay down the money.